M4-4X/M4-6X/PCS4XX (BA204X) Motherboard Settings and Configuration
OLIVETTI
M4-4X/M4-6X/PCS4XX (BA204X)
Processor | 80486SX/80487SX/80486DX/80486DX2 |
Processor Speed | 25/33/50(internal)/66(internal)MHz |
Chip Set | Unidentified |
Maximum Onboard Memory | 36MB |
Cache | None |
BIOS | Unidentified |
Dimensions | 254mm x 218mm |
I/O Options | Floppy drive interfaces (2), IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA port, riser slot, CD-ROM connector |
NPU Options | None |
CONNECTIONS | |||
Function | Label | Function | Label |
PS/2 mouse port | CN1 | CD -ROM connector | CN6 |
Parallel port | CN2 | IDE interface | CN7 |
Serial port 2 | CN3 | Floppy drive interface | CN8 |
Serial port 1 | CN4 | Floppy drive interface | CN9 |
VGA port | CN5 | Riser slot | SL1 |
USER CONFIGURABLE SETTINGS | |||
Setting | Label | Position | |
» | Factory configured - do not alter | F1 | N/A |
Hard drives installed 1 | J2 | Closed | |
Hard drives installed 2 | J2 | Open | |
» | Setup access disabled | J12 | Pins 2 & 3 closed |
Setup access enabled | J12 | Pins 1 & 2 closed | |
» | Mouse IRQ12 enabled | J13 | Pins 2 & 3 closed |
Mouse IRQ12 disabled | J13 | Pins 1 & 2 closed | |
» | Serial port 1 bootstrap enabled | J21 | Pins 2 & 3 closed |
Serial port 1 bootstrap disabled | J21 | Pins 1 & 2 closed | |
» | Serial port 2 bootstrap enabled | J25 | Pins 2 & 3 closed |
Serial port 2 bootstrap disabled | J25 | Pins 1 & 2 closed | |
» | Floppy drives not write protected | J33 | Pins 2 & 3 closed |
Floppy drives write protected | J33 | Pins 1 & 2 closed | |
» | Factory configured - do not alter | J45 | N/A |
DRAM | ||
Size | Bank 0 | Bank 1 |
4MB | 4MB | None |
8MB | 4MB | (1) 1M x 36 |
12MB | 4MB | (1) 2M x 36 |
20MB | 4MB | (1) 4M x 36 |
36MB | 4MB | (1) 8M x 36 |
Note: Bank 0 is factory configured and is not configurable. | ||
CPU TYPE | ||
Setting | J28 | J29 |
80486SX (PQFP) | Pins 1 & 2 closed | Pins 1 & 2 closed |
80486SX (PQFP)/80487SX | Pins 1 & 2 closed | Pins 1 & 2 closed |
80486SX (PQFP)/80486DX2 | Pins 1 & 2 closed | Pins 1 & 2 closed |
80486SX (PGA) | Pins 2 & 3 closed | Pins 1 & 2 closed |
80487SX | Pins 1 & 2 closed | Pins 1 & 2 closed |
80486DX | Pins 1 & 2 closed | Pins 2 & 3 closed |
80486DX2 | Pins 1 & 2 closed | Pins 2 & 3 closed |
CPU SPEED | |
Setting | J44 |
25MHz | Closed |
33MHz | Open |
50iMHz | Closed |
66iMHz | Open |
VIDEO MEMORY | ||
Size | Bank 0 | Bank 1 |
512KB | 512KB | None |
1MB | 512KB | 512KB |
Note: Bank 0 is factory installed and is not configurable. The chip sizes are unidentified. | ||
MISCELLANEOUS TECHNICAL NOTE |
The location of pin 1 is unidentified. |
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